Explanation

In 1856, William Henry Perkin accidentally discovered mauveine while working with coal tar.

It became the first synthetic dye, revolutionizing the textile and chemical industries.

Explanation

Rock candy forms when a supersaturated sugar solution cools and sugar crystals gradually crystallize out.

It shows crystallization from a supersaturated solution, not just a simple saturated one.

Explanation

A transitive verb is a verb that requires a direct object to complete its meaning.

In the sentence "The boy threw the ball," "threw" is the transitive verb, and "the ball" is the direct object.

Explanation

The Executive is responsible for implementing the laws made by the legislature.

It includes government officials, agencies, and departments that carry out and enforce laws.

Explanation

A group of lions is called a pride.

Flock refers to birds.

Pack refers to wolves.

Explanation

The total sum of all exterior angles of any triangle (or any simple polygon) is always 360°, regardless of its shape or size.

Each exterior angle of an equilateral triangle is 120°.

Explanation

To find z1z2:

z1 = 6 + 3i

z2 = 3 - 5i

z1z2 = (6 + 3i)(3 - 5i)

= 18 - 30i + 9i - 15i^2

= 18 - 21i + 15 (since i^2 = -1)

= 33 - 21i

Explanation

The term "philosophy" comes from the Greek words "philia" (love) and "sophia" (wisdom).

It means the love of wisdom, reflecting a pursuit of knowledge and understanding.

Explanation

Critical Thinking involves analyzing, evaluating, and synthesizing information to form sound judgments.

It uses intellectual skills to make logical, coherent decisions in various contexts.

Explanation

Formative Testing occurs during the learning process to monitor student progress.

It helps teachers adjust their methods and provides feedback to improve student learning.